Partition problem

Greetings!

I had a drive with two Fat32 partitions. With Partition Magic, I tried to “mesh” them into one. I made the mistake of stopping the operation in mid-action, and, after a reboot and after Partition Magic tried to recover the lost partition I ended up with one in Fat 32 (unchanged and working), and the other one as FF (hex) Xenix BBT. What is that and what can I do with it? How can I return it to Fat 32? Is it possible?
Thanks for your help.

Michel